if you think that's crazy, one of these days I'll post up everything I've done, and I BELIEVE that mine is asynchronous I'll phone full race tomorrow for confirmation, sorry I missed the question in your prior post

Go with a TD06-20G. The spool between the TD05 and TD06 is not that noticable with the proper tune, still get the same low/mid power with more on the top end (especially since you are looking for a greater number anyways).

I would say TD05 for the 5-speed and TD06 for the 6-speed. The Spool is more noticable on the wider RPM range used on the 5-speed. It's a taller gearset. On the 6-speed, past first gear there is only about a 3000 rpm usable range.